Author Topic: Top speed and RPM  (Read 782 times)

Cleprechaun

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Top speed and RPM
« on: November 07, 2018, 05:48:11 PM »
I have read that 45 mph is the top speed of a “White HT”. I opened mine up on a flat dirt road today and got it up to 33 mph according to the old speedometer. It was at 3000 rpm according to a modern cheap tach. Does this seem right ? The engine is a fresh rebuild and seems to run fine.

Hammerhead

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Re: Top speed and RPM
« Reply #1 on: December 24, 2018, 02:55:24 PM »
Mine was 35 MPH and I had to check with my buddy who has had his HT a long time.  He said that was his top speed too.  Going down a hill he said he reached 38 MPH. :D  I had heard 45 also.

spec4don

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Re: Top speed and RPM
« Reply #2 on: December 24, 2018, 05:59:42 PM »
I had mine up to about 40 once, 30 is just Fine!

Don G.
1941 M2A1 not restored
1942 M3 Diamond T Mostly restored
1943 M3A1 Under restoration
1967 M51A2 Tractor
1945 WC 63 needs restoration
1967 M36 Long wheel base duece
1951 M135 GMC Fire truck conversion

Cleprechaun

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Re: Top speed and RPM
« Reply #3 on: January 06, 2019, 09:24:07 PM »
I figured it out. The “economize” valve in the carburetor needed changing. Dramatic difference.

Cleprechaun

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Re: Top speed and RPM
« Reply #4 on: January 07, 2019, 10:07:33 PM »
This fixed it

spec4don

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Re: Top speed and RPM
« Reply #5 on: January 08, 2019, 10:28:19 AM »
Did you clean yours up or put in a new one? If you put in a new one where did you find it?

Don G.
1941 M2A1 not restored
1942 M3 Diamond T Mostly restored
1943 M3A1 Under restoration
1967 M51A2 Tractor
1945 WC 63 needs restoration
1967 M36 Long wheel base duece
1951 M135 GMC Fire truck conversion

Cleprechaun

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Re: Top speed and RPM
« Reply #6 on: January 30, 2019, 10:02:28 PM »
I put in a “new one” from an original old carb rebuild kit

autocar925

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Re: Top speed and RPM
« Reply #7 on: January 31, 2019, 11:58:39 AM »
43 on a long straight run at sea level.  From cold startup, it picks up about 5 MPH in top speed after the tracks get warm.  Tracks suck up a lot of power and they limber up as they get warm.  Seems to have a sweet spot at 28 MPH.  Everything clacking and buzzing along comfortably. 

spec4don

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Re: Top speed and RPM
« Reply #8 on: January 31, 2019, 12:12:27 PM »
That’s about right 30 seems the sweet spot for mine.
Don G
1941 M2A1 not restored
1942 M3 Diamond T Mostly restored
1943 M3A1 Under restoration
1967 M51A2 Tractor
1945 WC 63 needs restoration
1967 M36 Long wheel base duece
1951 M135 GMC Fire truck conversion